Unlock 8520 for other networks???

Hi,
I have a BlackBerry Curve 8520
v5.0.0.1036(Bundle 1682, Platform 5.2.0.104)
I have entered the NAC from my network provider(Vodafone) and the device says it unlocked.
When I put a SIMcard from another network(O2) into the phone it requested a NETWORK MEP CODE. At first I thought it was asking again for the NAC and wasted a few attempts entering that number to no avail. I then followed the online instructions to the engineering Help screen on the phone to obtain the MEP code. I then tried to enter this code but it would not accept this code either. It will work without any problem with a Vodafone SIM as always but still asks for the NETWORK MEP CODE when I try a SIM from O2. It now says (0 attempts).
Is there anything I can do to resolve this to unlock the device?
I have contacted Vodafone who say there should be no need to enter any code other than the NAC they provided me with.
I have contacted O2 who say they are not familiar with the problem but that the problem is with the device and probably needs to be sent somewhere to be unlocked.
Any help/advice gratefully appreciated.
Thank you.
J

LisaRuttle wrote:
Hi,
I have the same problem, and seriously ned help, i ahve only 4 attempts left and am being told to pay Vodafone €20 get it unblocked!
Hi and Welcome to the Community!
Please see this helpful thread to start:
http://supportforums.blackberry.com/t5/General-BlackBerry-Functions-and/Unlocking-your-BlackBerry-Gu...
If you use up all of your chances to enter the correct unlock code, there is nothing further you can do. Even if you happen to have now the correct code, it is useless. Only the factory can now (legally) unlock your BB. Typically, I've heard that the cost of having RIM do this for you will be greater than the cost of just buying a new one. But, you are able to ask them...see here:
http://us.blackberry.com/support/programs/technical/incident.jsp
Note, however, that this process will start with a fee...
If you obtained your unlock code from somewhere but it was incorrect, your recourse could be with them -- however, they may well question why you exhausted all 10 attempts before contacting them.
If your BB was already MEP locked and you obtained it from a source that represented it as being able to be unlocked, then your recourse would be with the seller you obtained it from.
Good luck!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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Occam's Razor nearly always applies when troubleshooting technology issues!
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Unlock 8520 for other networks???

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